Band-saw machine



(No Model.) 2 Sheets-Sheet 1. N. UOAN.

BAND SAW MACHINE.

No. 442,420. Patented Dec. 9, 1890.

WW4 QZM AQAALTlG/HOZMMQC i 4 NiTn n STATES PATENT OFFICE.

NOAII COAN, OF CINCINNATI, OHIO.

BAN D-SAW MACHINE.

SPECIFICATION forming part of Letters Patent No. 442,420, dated December9, 1890.

Application filed May 22, 1890. Serial No. 352,722. (No model.)

To a. whom, it may concern.-

Be it known that I, NOAH COAX, a citizen of the United States, and aresident of Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Band-Saw Machines,of which the following is a specification.

My invention relates to an improvement in band-saws; and it consists inthe construction and relative arrangement of parts, as hereinafterdescribed and claimed,and illustrated in the accompanying drawings,making apart of this specification, in which Figure 1 is a front view ofthe saw. Fig. 2 is a section on lineman, Fig. Fig. 3is aside elevation.Fig. a is a central vertical section of the journal of the lowersaw-pulley, and Fig. 5 is a section through the guide and follower onwhich the saw-pulleys are mounted.

A represel'its the base of the machine, to which is secured the table 13and segmental frame 0, on the face of which is a dovetailed groove 0.

1 represents a follower mounted in the groove 0, and on which thesaw-pulleys 2 3 are journaled, the journal f being made in sections andsecured on the opposite sides of the follower 1, as indicated in Fig. 4.

4 represents gear-teeth cut on the outer edge of the follower 1, intowhich mesh the teeth of the spur-wheel 5. The wheel 5 is actuatedthrough the worm 6, worm-wheel 7 by means of the crank S.

9 represents saw-guides, which are also secured to the follower 1.

10 represents a boxing, in which the journal of the pulley 2 rests upona buffer 11.

12 represents a hand-wheel for adjusting the tension of the buffer.

13 represents a d living-pulley secured upon shaft 14.

15 is a pulley on the same shaft, from which the saw-pulley 3 receivesits motion through the pulley 16 at the opposite end of its shaft.

17 represents a tightening-pulley to maintain the tension of the beltand take up the slack as the saw-pulleys are shifted from one positionto another. The pulley 17 is mounted in the hanger 18, which hangs fromthe shaft 14, and the tension is maintained by means of the rope 19,passing over pulley 20, and having at its opposite end a weight 21.

22 represents a feed-roller secured immediately back of the saw. It ismounted on the shaft 23, at the other end of which is a wormwheel 24,receiving motion through worm 25, pulley 26, and pulley 27, which issecured on the main shaft 11. The frame C is provided with segmentalslots, as shown at h b, Fig. 2, in order to permitthe passage of thejournals secured to the inside of the follower 1.

The operation of my device is as follows: The saw may be set at anydesired angle to the plane of the table by turning the crank 8, whichmoves the follower 1, through worm 6, worm-wheel 7, spur-gear 5, andrack 4. The saw is then started, the pulley 17 keeping the tension ofthe belt by means of the rope 19, pulley 20, and weight 21, the feed 22being operated on the main shaft through pulley 27 pulley 26, worm 25,and worm-wheel 21, the material being fed in in the usual manner untilit reaches the feed-roll 22, which carries it steadily forward.

The feed-roller may be dispensed with in machines designed for lightwork.

Having described my invention, what I claim is 1. In a band-saw machine,the combination of the stationary segmental frame 0, having thesegmental slots 12 b, and provided on one side with a segmentaldovetailed groove 0, the adj ustablesegm ental follower-frame 1, mountedin the slotted and grooved frame C, and the saw-carrying pulleys andguides mounted on said follower-frame, substantially as de scribed.

52. In a band-saw machine, the combination of the frame A, the table B,the stationary segmental frame C, having the segmental slots b b andprovided on one side with a segmental dovetailed groove 0, theadjustable segmental follower-frame 1, mounted in the groove 0, thesaw-carrying pulleys 2 and 3, mounted in the adjustable follower-frame,and the driving mechanism, substantially as shown and described.

In a band-saw machine, the combination of the stationary segmental frame0, having the segmental slots b Z) and provided on one In testimonywhereof I have hereunto set my hand.

NOAH. COAN.

Witnesses:

T. SIMMONS, C. W. MILES.

